<button type='button' class='el-button el-button--success el-button--mini'>
  <span pk='{{ pk }}'><a href="{% url 'survey-report' pk %}" style="color: white">查看报告</a></span>
</button>
<a href="{% url 'survey-download' pk %}" class='el-button el-button--default el-button--mini'>
  <span pk='{{ pk }}'>下载</span>
</a>